legal marijuana sales could generate washington $500 million a year in taxes and business. opponents worry legalization will lead to more people using drugs. >> this is not what you're going to pick up in baggy at the corner. >> it's the opposite. >> reporter: a former microsoft executive has plans for up market marijuana shops. >> we're positioning premium marijuana similar to a fine cigar. something to be saverred. something to be consumed in moderation. >> reporter: the new stores would be modeled after those in many states for alcohol. by next month a similar law will go into effect in colorado. but all those big plans could go up in smoke because of federal law. the justice department says it's studying the situation here in washington but the feds have warned residents of the state that under federal law all marijuana use is illegal. >> well, if you've ever bashed a business online, beware. those nasty comments could cost you. a virginia woman got slapped with a $700,000 lawsuit for criticizing her contractor. her scathing reviews on angies list and yelp included pict